Frequency measuring apparatus
United States Patent 2933682
US Patent References:
Method and apparatus for indicating frequency coincidence between alternating currents or voltages
- - 2452960
Means for measuring difference in frequency of alternating currents
- - 2474253
Triggered frequency control
- - 2543058
Apparatus for measuring the phase shift between the input and output voltages of a circuit under test
- - 2595263
Electronic comparator device
- - 2615127
Method and apparatus for indicating frequency coincidence between alternating currents or voltages
- - 2452960
Means for measuring difference in frequency of alternating currents
- - 2474253
Triggered frequency control
- - 2543058
Apparatus for measuring the phase shift between the input and output voltages of a circuit under test
- - 2595263
Electronic comparator device
- - 2615127
Inventors:
Moulton, Arthur B.
Webb, Joseph A.
Webb, Joseph A.
Publication Date:
04/19/1960
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Export Citation:
Assignee:
GEN DYNAMICS CORP
Primary Class:
Other Classes:
327/12, 324/76.440, 324/76.820, 327/6, 324/76.520, 324/76.550
International Classes:
G01R23/00; G01R25/00
US Patent References: